The same problem on my HP Compaq 6735b. The brightness cannot be adjusted by Fn + F7/F8. The taskbar brightness applet doesn't work as well unfortunately. I tried on both Ubuntu 10.04 32bit and 64bit. On Ubuntu 9.10 there were no problem with brightness adjustment.
The same problem on my HP Compaq 6735b. The brightness cannot be adjusted by Fn + F7/F8. The taskbar brightness applet doesn't work as well unfortunately. I tried on both Ubuntu 10.04 32bit and 64bit. On Ubuntu 9.10 there were no problem with brightness adjustment.
My ATI driver is installed.